A mobile OS is the software platform specifically designed to run exclusively on mobile devices such as smartphones, PDAs, tablet computers, as well as other handheld devices. The two leading mobile operating systems worldwide are Google’s Android and Apple's iOS, which runs on all of Apple’s devices such as the iPhone and iPad. Android OS’s currently dominates the smartphone operating system market with a share over 80 percent of the global market: Around 1.24 billion smartphones with the Android OS were shipped in 2017. Other smartphone operating systems include: Microsoft’s Windows Mobile, Nokia’s Symbian OS, and Blackberry’s RIM.
Android is also the dominant OS in the global tablet market with more than 60 percent of the market share. Apple though is the vendor which has consistently shipped the most tablets over the last few years. Also among the leading tablet vendors are Samsung, Lenovo, and Huawei.